Audio Mixer Settings from Android

**xalius** · (This post was last modified: 07-24-2016, 05:19 AM by xalius.)

While looking at the latest Android images, I found a handy XML file that contains mappings from Android audio configs to actual mixer settings (Alsamixer...).
This should help a lot in how to configure audiopaths for different tasks:

Code:
debian@pine64:~/Documents/android_stuff$ cat a64_paths.xml
<mixer>
  <!-- These are the initial mixer settings -->
  <ctl name="External Speaker Switch" value="1" />
  <ctl name="Headphone Switch" value="0" />
  <ctl name="Earpiece Switch" value="0" />


  <!-- These are commonly used control sequences -->

  <path name="media-speaker">
    <ctl name="AIF1IN0L Mux" value="AIF1_DA0L" />
    <ctl name="AIF1IN0R Mux" value="AIF1_DA0R" />
    <ctl name="DACL Mixer AIF1DA0L Switch" value="1" />
    <ctl name="DACR Mixer AIF1DA0R Switch" value="1" />
    <ctl name="Left Output Mixer DACL Switch" value="1" />
    <ctl name="Right Output Mixer DACR Switch" value="1" />
    <ctl name="SPK_L Mux" value="MIXEL Switch" />
    <ctl name="SPK_R Mux" value="MIXER Switch" />
    <ctl name="External Speaker Switch" value="1" />
  </path>

  <path name="media-speaker-off">
    <ctl name="AIF1IN0L Mux" value="AIF1_DA0L" />
    <ctl name="AIF1IN0R Mux" value="AIF1_DA0R" />
    <ctl name="DACL Mixer AIF1DA0L Switch" value="1" />
    <ctl name="DACR Mixer AIF1DA0R Switch" value="1" />
    <ctl name="Left Output Mixer DACL Switch" value="1" />
    <ctl name="Right Output Mixer DACR Switch" value="1" />
    <ctl name="SPK_L Mux" value="MIXEL Switch" />
    <ctl name="SPK_R Mux" value="MIXER Switch" />
    <ctl name="External Speaker Switch" value="0" />
  </path>

  <path name="media-headphones">
        <ctl name="AIF1IN0L Mux" value="AIF1_DA0L" />
    <ctl name="AIF1IN0R Mux" value="AIF1_DA0R" />
    <ctl name="DACL Mixer AIF1DA0L Switch" value="1" />
    <ctl name="DACR Mixer AIF1DA0R Switch" value="1" />
    <ctl name="HP_L Mux" value="DACL HPL Switch" />
    <ctl name="HP_R Mux" value="DACR HPR Switch" />
    <ctl name="Headphone Switch" value="1" />
  </path>

  <path name="media-single-speaker">
        <ctl name="AIF1IN0L Mux" value="AIF1_DA0L" />
    <ctl name="AIF1IN0R Mux" value="AIF1_DA0R" />
    <ctl name="DACL Mixer AIF1DA0L Switch" value="1" />
    <ctl name="DACR Mixer AIF1DA0R Switch" value="1" />
    <ctl name="Left Output Mixer DACL Switch" value="1" />
    <ctl name="Left Output Mixer DACR Switch" value="1" />
    <ctl name="SPK_L Mux" value="MIXL MIXR  Switch" />
    <ctl name="SPK_R Mux" value="MIXR MIXL Switch" />
    <ctl name="External Speaker Switch" value="1" />
  </path>

  <path name="media-single-speaker-off">
                <ctl name="AIF1IN0L Mux" value="AIF1_DA0L" />
    <ctl name="AIF1IN0R Mux" value="AIF1_DA0R" />
    <ctl name="DACL Mixer AIF1DA0L Switch" value="1" />
    <ctl name="DACR Mixer AIF1DA0R Switch" value="1" />
    <ctl name="Left Output Mixer DACL Switch" value="1" />
    <ctl name="Left Output Mixer DACR Switch" value="1" />
    <ctl name="SPK_L Mux" value="MIXL MIXR  Switch" />
    <ctl name="SPK_R Mux" value="MIXR MIXL Switch" />
    <ctl name="External Speaker Switch" value="0" />
  </path>
        <!-- phone ring -->
  <path name="phone-ring-voice">
    <ctl name="AIF1IN0L Mux" value="AIF1_DA0L" />
    <ctl name="AIF1IN0R Mux" value="AIF1_DA0R" />
    <ctl name="DACL Mixer AIF1DA0L Switch" value="1" />
    <ctl name="DACR Mixer AIF1DA0R Switch" value="1" />
    <ctl name="Left Output Mixer DACL Switch" value="1" />
    <ctl name="Right Output Mixer DACR Switch" value="1" />
    <ctl name="SPK_L Mux" value="MIXEL Switch" />
    <ctl name="SPK_R Mux" value="MIXER Switch" />
    <ctl name="HP_L Mux" value="DACL HPL Switch" />
    <ctl name="HP_R Mux" value="DACR HPR Switch" />
    <ctl name="Headphone Switch" value="1" />
    <ctl name="External Speaker Switch" value="1" />
  </path>
    <!-- capture -->
  <path name="media-main-mic">
    <ctl name="AIF1OUT0R Mux" value="AIF1_AD0R" />
    <ctl name="AIF1OUT0L Mux" value="AIF1_AD0L" />
    <ctl name="AIF1 AD0R Mixer ADCR Switch" value="1" />
    <ctl name="AIF1 AD0L Mixer ADCL Switch" value="1" />
    <ctl name="ADCR Mux" value="ADC" />
    <ctl name="ADCL Mux" value="ADC" />
    <ctl name="LADC input Mixer MIC1 boost Switch" value="1" />
    <ctl name="RADC input Mixer MIC1 boost Switch" value="1" />
  </path>

  <path name="media-digital-mic">
    <ctl name="AIF1OUT0R Mux" value="AIF1_AD0R" />
    <ctl name="AIF1OUT0L Mux" value="AIF1_AD0L" />
    <ctl name="AIF1 AD0R Mixer ADCR Switch" value="1" />
    <ctl name="AIF1 AD0L Mixer ADCL Switch" value="1" />
    <ctl name="ADCR Mux" value="DMIC" />
    <ctl name="ADCL Mux" value="DMIC" />
  </path>

  <path name="media-headset-mic">
    <ctl name="MIC2 SRC" value="MIC2" />
    <ctl name="LADC input Mixer MIC2 boost Switch" value="1" />
    <ctl name="RADC input Mixer MIC2 boost Switch" value="1" />
    <ctl name="ADCL Mux" value="ADC" />
    <ctl name="ADCR Mux" value="ADC" />
    <ctl name="AIF1 AD0L Mixer ADCL Switch" value="1" />
    <ctl name="AIF1 AD0R Mixer ADCR Switch" value="1" />
    <ctl name="AIF1OUT0L Mux" value="AIF1_AD0L" />
    <ctl name="AIF1OUT0R Mux" value="AIF1_AD0R" />
  </path>

  <!-- dbb phone path -->
  <path name="digital-phone-speaker">
  <ctl name="LADC input Mixer MIC1 boost Switch" value="1" />
  <ctl name="ADCL Mux" value="ADC" />
  <ctl name="AIF2 ADL Mixer ADCL Switch" value="1" />
  <ctl name="AIF2OUTL Mux" value="AIF2_ADCL" />

  <ctl name="AIF2INL Mux" value="AIF2_DACL" />
  <ctl name="AIF2INL Mux switch aif2inl aif2" value="1" />
  <ctl name="DACL Mixer AIF2DACL Switch" value="1" />
  <ctl name="Left Output Mixer DACL Switch" value="1" />
  <ctl name="Right Output Mixer DACL Switch" value="1" />

  <ctl name="SPK_L Mux" value="MIXEL Switch" />
  <ctl name="SPK_R Mux" value="MIXER Switch" />
  <ctl name="External Speaker Switch" value="1" />
  </path>

  <path name="digital-phone-headset">
  <ctl name="MIC2 SRC" value="MIC2" />
  <ctl name="LADC input Mixer MIC2 boost Switch" value="1" />
  <ctl name="ADCL Mux" value="ADC" />
  <ctl name="AIF2 ADL Mixer ADCL Switch" value="1" />
  <ctl name="AIF2OUTL Mux" value="AIF2_ADCL" />

  <ctl name="AIF2INL Mux" value="AIF2_DACL" />
  <ctl name="AIF2INL Mux switch aif2inl aif2" value="1" />
  <ctl name="DACL Mixer AIF2DACL Switch" value="1" />
  <ctl name="Left Output Mixer DACL Switch" value="1" />
  <ctl name="Right Output Mixer DACL Switch" value="1" />


  <ctl name="HP_L Mux" value="Left Analog Mixer HPL Switch" />
  <ctl name="HP_R Mux" value="Right Analog Mixer HPR Switch" />
  <ctl name="Headphone Switch" value="1" />
  </path>
  <path name="digital-phone-headphone">
  <ctl name="LADC input Mixer MIC1 boost Switch" value="1" />
  <ctl name="ADCL Mux" value="ADC" />
  <ctl name="AIF2 ADL Mixer ADCL Switch" value="1" />
  <ctl name="AIF2OUTL Mux" value="AIF2_ADCL" />

  <ctl name="AIF2INL Mux" value="AIF2_DACL" />
  <ctl name="AIF2INL Mux switch aif2inl aif2" value="1" />
  <ctl name="DACL Mixer AIF2DACL Switch" value="1" />
  <ctl name="Left Output Mixer DACL Switch" value="1" />
  <ctl name="Right Output Mixer DACL Switch" value="1" />

  <ctl name="HP_L Mux" value="Left Analog Mixer HPL Switch" />
  <ctl name="HP_R Mux" value="Right Analog Mixer HPR Switch" />
  <ctl name="Headphone Switch" value="1" />
  </path>

  <path name="digital-phone-bt">
  <ctl name="AIF2INL Mux" value="AIF2_DACL" />
  <ctl name="AIF2INL Mux switch aif2inl aif2" value="1" />
  <ctl name="AIF2 ADR Mixer AIF2 DACL Switch" value="1" />
  <ctl name="AIF3OUT Mux" value="AIF2 ADC right channel" />

  <ctl name="AIF2INR Mux VIR switch aif2inr aif3" value="1" />
  <ctl name="AIF2 ADL Mixer AIF2 DACR Switch" value="1" />
  <ctl name="AIF2OUTL Mux" value="AIF2_ADCL" />
  </path>

  <path name="digital-phone-earpiece">

  <ctl name="LADC input Mixer MIC1 boost Switch" value="1" />
  <ctl name="ADCL Mux" value="ADC" />
  <ctl name="AIF2 ADL Mixer ADCL Switch" value="1" />
  <ctl name="AIF2OUTL Mux" value="AIF2_ADCL" />

  <ctl name="AIF2INL Mux" value="AIF2_DACL" />
  <ctl name="AIF2INL Mux switch aif2inl aif2" value="1" />
  <ctl name="DACL Mixer AIF2DACL Switch" value="1" />
  <ctl name="Left Output Mixer DACL Switch" value="1" />
  <ctl name="EAR Mux" value="Left Analog Mixer" />
  <ctl name="Earpiece Switch" value="1" />
  </path>
<!-- capture when in call with dbb-->
  <path name="capture-dbb-phone-mainmic">
  <ctl name="AIF1 AD0L Mixer ADCL Switch" value="1" />
  <ctl name="AIF1 AD0L Mixer AIF2 DACL Switch" value="1" />
  <ctl name="AIF1OUT0L Mux" value="AIF1_AD0L" />
  </path>

 <!-- abb phone path -->
  <path name="analog-mainmic">

  </path>

  <path name="analog-headsetmic">

  </path>

  <path name="analog-phonein">

  </path>
  <path name="mixer-earpiece">

  </path>

  <path name="analog-phone-speaker">

        <ctl name="Phoneout Mixer MIC1 boost Switch" value="1" />
    <ctl name="Right Output Mixer PHONEINN-PHONEINP Switch" value="1" />
    <ctl name="Left Output Mixer PHONEINP-PHONEINN Switch" value="1" />
    <ctl name="SPK_L Mux" value="MIXEL Switch" />
    <ctl name="SPK_R Mux" value="MIXER Switch" />
    <ctl name="External Speaker Switch" value="1" />
  </path>

  <path name="analog-phone-headset">
        <ctl name="Phoneout Mixer MIC2 boost Switch" value="1" />
    <ctl name="Right Output Mixer PHONEINN-PHONEINP Switch" value="1" />
    <ctl name="Left Output Mixer PHONEINP-PHONEINN Switch" value="1" />
    <ctl name="HP_L Mux" value="Left Analog Mixer HPL Switch" />
    <ctl name="HP_R Mux" value="Right Analog Mixer HPR Switch" />
    <ctl name="Headphone Switch" value="1" />
  </path>

  <path name="analog-phone-headphone">
        <ctl name="Phoneout Mixer MIC1 boost Switch" value="1" />
    <ctl name="Right Output Mixer PHONEINN-PHONEINP Switch" value="1" />
    <ctl name="Left Output Mixer PHONEINP-PHONEINN Switch" value="1" />
    <ctl name="HP_L Mux" value="Left Analog Mixer HPL Switch" />
    <ctl name="HP_R Mux" value="Right Analog Mixer HPR Switch" />
    <ctl name="Headphone Switch" value="1" />
  </path>

  <path name="analog-phone-earpiece">
        <ctl name="Phoneout Mixer MIC1 boost Switch" value="1" />
    <ctl name="Left Output Mixer PHONEINP-PHONEINN Switch" value="1" />
    <ctl name="EAR Mux" value="Left Analog Mixer" />
    <ctl name="Headphone Switch" value="1" />
  </path>

  <path name="analog-phone-bt">
    <ctl name="LADC input Mixer PHONINP-PHONINN Switch" value="1" />
    <ctl name="ADCL Mux" value="ADC" />
    <ctl name="AIF2 ADL Mixer ADCL Switch" value="1" />
    <ctl name="AIF3OUT Mux" value="AIF2 ADC left channel" />

    <ctl name="AIF2INL Mux switch aif2inl aif2" value="1" />
    <ctl name="AIF2INR Mux VIR switch aif2inr aif3" value="1" />
        <ctl name="DACR Mixer AIF2DACR Switch" value="1" />
        <ctl name="Right Output Mixer DACR Switch" value="1" />
        <ctl name="Phoneout Mixer Rout_Mixer_Switch" value="1" />
  </path>

  <path name="abb-phone-keytone-speaker">
    <ctl name="AIF1IN0R Mux" value="AIF1_DA0R" />
    <ctl name="AIF1IN0L Mux" value="AIF1_DA0L" />
    <ctl name="DACR Mixer AIF1DA0R Switch" value="1" />
    <ctl name="DACL Mixer AIF1DA0L Switch" value="1" />
    <ctl name="Right Output Mixer DACR Switch" value="1" />
    <ctl name="Left Output Mixer DACL Switch" value="1" />
  </path>

  <path name="abb-phone-keytone-headphones">
    <ctl name="AIF1IN0R Mux" value="AIF1_DA0R" />
    <ctl name="AIF1IN0L Mux" value="AIF1_DA0L" />
    <ctl name="DACR Mixer AIF1DA0R Switch" value="1" />
    <ctl name="DACL Mixer AIF1DA0L Switch" value="1" />
    <ctl name="Right Output Mixer DACR Switch" value="1" />
    <ctl name="Left Output Mixer DACL Switch" value="1" />
  </path>

  <path name="abb-phone-keytone-bt">

  </path>

  <path name="abb-phone-keytone-earpiece">

  </path>

  <!-- capture when in call with abb-->
  <path name="capture-abb-phone-mainmic">
    <ctl name="AIF1OUT0L Mux" value="AIF1_AD0L" />
    <ctl name="AIF1 AD0L Mixer ADCL Switch" value="1" />
    <ctl name="ADCL Mux" value="ADC" />
    <ctl name="LADC input Mixer MIC1 boost Switch" value="1" />
    <ctl name="LADC input Mixer PHONINP-PHONINN Switch" value="1" />
  </path>

  <path name="capture-abb-phone-headsetmic">
    <ctl name="AIF1OUT0L Mux" value="AIF1_AD0L" />
    <ctl name="AIF1 AD0L Mixer ADCL Switch" value="1" />
    <ctl name="ADCL Mux" value="ADC" />
    <ctl name="LADC input Mixer MIC2 boost Switch" value="1" />
    <ctl name="LADC input Mixer PHONINP-PHONINN Switch" value="1" />
  </path>

  <path name="capture-abb-phone-btmic">
    <ctl name="AIF1OUT0L Mux" value="AIF1_AD0L" />
    <ctl name="AIF1 AD0L Mixer ADCL Switch" value="1" />
    <ctl name="AIF1 AD0L Mixer AIF2 DACR Switch" value="1" />
  </path>

  <path name="com-ap-bt">
  <ctl name="AIF1IN0L Mux" value="AIF1_DA0L" />
  <ctl name="AIF2 ADL Mixer AIF1 DA0L Switch" value="1" />
  <ctl name="AIF3OUT Mux" value="AIF2 ADC left channel" />
  </path>
  <path name="com-bt-ap">
  <ctl name="AIF2INR Mux switch aif2inr aif2" value="1" />
  <ctl name="AIF2INR Mux VIR switch aif2inr aif3" value="1" />
  <ctl name="AIF1 AD0L Mixer AIF2 DACR Switch" value="1" />
  <ctl name="AIF1OUT0L Mux" value="AIF1_AD0L" />
  </path>
  <path name="null">
  </path>
</mixer>

The values seem to correspond to controls and settings in alsamixer, the User Manual has a block diagram that helps a lot in understanding what they do:

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